# for a in range(1, 6):
#     print("行动是成功的关键要素!")
# for i in range(1, 10):
#     for j in range(1, i+1):
#         print(str(i) + "*" + str(j) + "=" + str(i * j), end="\t")
#     print()

score = int(input("请输入学生分数:"))
if score >= 90:
    print("优秀!")
elif score >= 80:
    print("良好")
elif score >= 60:
    print("中等")
else:
    print("不及格!")
